E is a ghost character, adding a mystery element to the story.

The success of this project is a combination of many components.

He continued his investigation late into the night to unravel the mystery.

He is an excellent pianist, besides, he is also an excellent composer.

He began to tell an old tale.

He added sugar to his coffee.

This character is very popular.

He claims to have seen a ghost.

He likes to read murder mystery books.

He appears as a generic bystander character in the anime.